66683125 has 10 divisors (see below), whose sum is σ = 83328014. Its totient is φ = 53346000.

The previous prime is 66683117. The next prime is 66683143. The reversal of 66683125 is 52138666.

It can be written as a sum of positive squares in 5 ways, for example, as 25492401 + 41190724 = 5049^2 + 6418^2 .

It is not a de Polignac number, because 66683125 - 2³ = 66683117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 52722 + ... + 53971.

Almost surely, 2^66683125 is an apocalyptic number.

It is an amenable number.

66683125 is a deficient number, since it is larger than the sum of its proper divisors (16644889).

66683125 is an equidigital number, since it uses as much as digits as its factorization.

66683125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106713 (or 106698 counting only the distinct ones).

The product of its digits is 51840, while the sum is 37.

The square root of 66683125 is about 8165.9736100480. The cubic root of 66683125 is about 405.5134979287.

The spelling of 66683125 in words is "sixty-six million, six hundred eighty-three thousand, one hundred twenty-five".